Stop mechanism for sewing-machines.



PATENTED MAY 19, 1903.

D. MILLS. STOP MEGHANISMPO-R' SEWING MACHINES.

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L E D 0 M 0 \N WITNESSES THE ucwms PEYEHS co, Pnomumo WASHINGTON, u. c.

'No. 728L269.

' PATENT-ED MAY 19, 1903.

D... MILLS. v STOP MECHANISM FOR SEWING MACHINES.

APPLICATION FILED MAY 7; 1898- NO MODEL.

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INVENTOR WITNESSES m ATTORNEY Ya: mum vzrzns cov PnoTm mm. msumcmm n. c.

- No. 728,269. PATENTED MAY 19,1903.

, 1). MILLS. $101 MECHANISM FOR SEWING MACHINES. APPLICATION FILED MAY7, 1898. I H0 MODEL. 3 SHEETS-SHEET 3.

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ms PEYER5 co PHOTOLITHQ. WASHINGYON n c UNITED STATES PATENT OFFICE.

DANIEL MILLS, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE STANDARDSEWING MACHINE COMPANY, .OLEV-ELAND, OHIO, A

CORPORATION OF OHIO.

SPECIFICATION forming-"part of Letters Patent No. 728,269, dated May 19,1903.

' Application filed May 7,1898. .S;erial No. 680,026. on model.) i

To a whom it may concern:

Be it known that I, DANIEL MILLS, 'a citizen of the United States, and'aresident of' Philadelphia, State of Pennsylvania, have invented certainnew and useful Improve-- ments in Stop Mechanism for SeWing-Machines, ofwhich the following description,"

taken in connection with the drawings herewith accompanying, is aspecification.

In certain classes of sewingmachines such as buttonhole-stitching andbutton-sewingmachinesitisdesirablethatthemachines shall be automaticallystopped after a certain predetermined number of stitches have beentaken, and it is also desirable that the machines should bethus stoppedwith the needle abov'e'ithe workand the take-up in a position at oradjacent to its upward limit of:

movement; and myipr'esent invention "has for its principal object'to-provide-a'stopping mechanism which will operate to automatic allystop a machine at the time and in the position referred towithoutundueijarfor;

shock to the same. This object I secure by means of the constructionandf'arrangement; of parts,as hereinafter setforth in detail,- andpointed out inthe claims.

Referring to the accompanying drawings, Figure 1 is a side viewofaseWing-machine Fig. 2'is a plan embodying my invention. 7 view of thesewing-machine bed-plate-with the arm in section through line 2 2 ofFig. 1, showing part of a buttonhole-stitchingmechanism'andtheconnection between the same and the stoppingfmechani sm.rear end view of the machine with the'loose driving-pulley removed andits engaging lever and lever-supporting bracket in section through line3 3 of Fig. tisayertical section of the machine throi'ighdine 4 4!driving-shaft a of the machine in the usual manner.

Fig. 3 is a This, pulley b is provided withla fnub b, upon which isloosely mounted a driving-pulley b which latter is. supported to havea-longitudinal movement upon the hub 5', whereby it may be moved at thewill lot the operator by means as Willhereinafter "be described to andfrom a position to clutch with the pulley and communicate motion to themachine. Any suitable form of clutch connection may be had between saidpulleys, the connection,as herein shown,being secured by means of acone-faced hub 19 on the driving-pulley, which is adapted to enter aninteriorly-cone-faced hub-sleeve b on the pulley b and when forcedtherein frictionally hold the pulleys together.

As a means for moving or forcing the driv- -,in*g-pulley into engagementwith the driven jpulley b I have provided an elbow-lever c, ;which ispivotally supported at 0' upon a ;bracket a secured upon the frame orarm of the machine-and forming a part thereof. The lever c is arrangedwith one arm c extending into a position to engagewith the hub b 'ofithe driving-pulley andwith its other armc lextendin'g beneath thepulley b and provided I with a friction-brake d thereon for engagingwith the latter. :formed with an angle, so that apartthereof, as 0,=upon.which the brake is secured, will The armc ofthe lever c is extendparallel with the pulley b, as shown in Figs. 3 and 4:.

The lever o'connectswit'h a slide-plate e, so as to be movable therewithby having a pin .orproje'ction c thereon extend into an open- ;ii'nge"in said plate. ,ported-ina vertically-movable position upon thebracket n? by means of an embracing i guide-plate 8 securedto saidbracket and is provided with a notch in one side thereof adjacent to itslower end intowhich one edge e 1 Offl. horizontally-movable slide plateor latch e {i's adapted to extend when the machine is This slide-plate eis supinoperation, so as to hold'the said vertical slide-plate e in alowered position, with the lever 0 forcing the driving-pulley intooperative engagement with the driven pulley and with the brake away fromcontact with the latter.

The plate or latch e, which is supported on Patented May 19,1903.

the bed-plate of the machine, is provided with a cut-away portion 6 inone edge thereof, so that after it has been moved horizontally a certainpredetermined distance by suitable automatic mechanism, as willhereinafter be referred to, such cut-away portion will be broughtopposite the notch in the slide-plate, so as to release the latter, andthereby allow the lever c to be moved to a position with one armreleasing the driving-pulley from contact with the pulley b and thebrake d on its other arm in engagement with the latter pulley, as shownby dotted linesin Fig. 1. Such movement of the lever c to stop themachine is secured by means of a spring f, which is secured upon thebracket a with one end exerting a normal upward pressure against theunderside of the lower arm of the lever c, as shown.

Although the machine will he brought to a stop when the driving-pulleyis thus released from engagement with the fast or driven pulley and thebrake applied to the latter, it will not be stopped with the parts inany definite orpredetermined position,as is desirable, and in order toaccomplish this I have provided a means as follows: A collar or ringh isloosely supported upon the hub of the pulley l) and is provided with afixed pin 71, thereon, which projects through an elongated slot [L2 insaid pulley. On that side of the pulley opposite the ring it a coiledspring i is supported, with one end acting against a fixed pin it on thepulley b and its opposite end acting against the said pin hof the ringh, so as to movably hold the said ring and pulley in a normalstationaryposition relative to each other,with the pin h of the ring atone end of the slot 71 in the pulley, as shown in Fig. 3.

A fixed arm 7:; of the lever 0 extends into a position opposite one sideof the ring h and is provided with a bent end, as at forming a catchwhich is adapted to be automatically moved into a position to engagewith a projection h on the said ring h, as shown by dotted lines in Fig.1, when the lever c is operated to release the driving-pulley from thepulley b and move the brake d into engagement with the latter, ashereinbefore described. When the arm 70 thus engages with the projectionon the ring h, the latter is brought to a positive stop, while thepulley I) under the momentum of the machine may continue its rotation,as shown by dotted lines in Fig. 3. Such further rotation of the pulley,however, is against the pressure of the spring,whose opposite end hasbeen made stationary with the ring 71., and after its momentum has beenovercome the reaction of the spring is suflicient to return the pulleyto a position with the end wall of its slot h against the now-stationarypin of the ring h, in which position of the pulley the machine is in adefinite desired position, with the needle above the work and thetake-up at or adjacent to its upward limit of movement, as shown inFig. 1. In this manner the machine as the stopping mechanism is completewithout the same.

When the lever c is moved to force the pulley 5 into engagement with thepulley b for the purpose of again starting the machine,

'such movement throws the catch end of the arm 70 out of engagement withthe projection on the ring h and in a position at one side the path ofmovement of the same, as shown in Fig. 1, so as to release said ring andallow it to rotate with the pulley b.

The horizontally-acting slide-latch e, which is operated to release theslide (1 at a certain predetermined time for the purpose of cansing themachine to be stopped, may be operated by any suitable automaticmechanism, the same as herein shown being the buttonhole-stitchingmechanism illustrated and described in another application of mine nowpending, filed November 9, 1896, and bearing Serial No. Gl1,486,which inpart is as follows: A slide-plate m,which connects with the workclamp inmy said buttonhole-stitching machine to give the same its longitudinalmovement, is supported on the bed-plate of the machine and provided withtwo pins m m, between which a rotatingheart-cam m operates tocommunicate a longitudinal forward and backward movement thereto. Alever'n, centrally pivoted on the bed plate of the machine, is connectedat one end with the plate m to be moved thereby and at its opposite endis provided with an adjusting-screw n, which bears against one end ofthe slide-latch e. By this means as the plate m is moved forward duringthe stitching of one side of a buttonhole the lever is moved thereby ina direction away from engagement with the slide 6 and as said plate m ismoved backward or in the opposite direction during the stitching of theother side of the buttonhole the lever 92 is moved into engagement withthe said plate e and moves the latter longitudinally, so that when theplate m has been moved the proper distance to complete the buttonholethe latch 6 will also have been moved the necessary distance to bringthe notch or cut-away portion c therein opposite the vertical slide 6 torelease the latter, and thereby allow the stopping mechanism to operateto stop the machine in the manner as described. By turning theadjusting-screw n in the proper direction, so that its end will projectmore or less beyond the lever 92, the timing of the movement of theslide 6 may be regulated to release the slide cl sooner or later,according to the number of stitches it may be desired to have themachine make before being stopped. The machine may also be stopped atany time independent of the automatic mechanism by operating the latch cby hand, the forward end of which is turned up to enable the same to begrasped by the operator for such purpose.

A chain or other suitable connection extending beneath the machine maybe attachedto the slide 6 as a means for loweringthe same a when it isdesired to start the machine, and a p, which is pivotally supported uponthe bracket o into engagement with a pin p on the lever 0, so as to holdthe latter in its position, with the pulley b in contact with the pulleyb and the braking mechanism in inoperative position. When the lever c isthus held, there is no movement of the same when the latch c is movedinto position to release the slide 6.

Having thus set forth my invention, what I claim as new, and desire tosecure by Letters Patent of the United States, is

1. In a sewing-machine, the combination, with the main shaft, of'apulley made fast on said shaft and provided with an elongated slottherein, a ring loosely supported on said shaft and provided with a pinextending throughthe said slot in the pulley, a spring yieldinglyholding said ring with its pin in a normal position against an end wallof said slot, a pivoted rocking lever having means for engaging withsaid ring to stop rotation of the same and the connected pulley, andmeans, embodying a vertical slide and a horizontally-acting latch, forautomatically controlling the action of saidlever, for the purpose setforth.

2. In a sewing-machine, thecombination, with the main shaft having fastand loose pulleys, the former having a yieldingly-connected stopprojection-at one side thereof, of a pivoted rocking lever having onearm for engaging with the loose pulley to force the same into contactwith the fast pulley, and a second arm for engaging with the stopprojection of the fast pulley, the said arms be ing so arranged thatwhen the. lever is operated to place one arm into operative position,the other arm is thereby moved or placed in an inoperative position, andmeans, embodying a slide, for automatically controlling the action ofsaid lever, for the purpose set forth.

3. In a sewing-machine, the combination with the main shaft having fastand loose pulleys, the former having a connected stop projection at oneside thereof, of a pivoted lever having one arm for engaging with theloose pulley to force the same into contact with the fast pulley, and asecond arm for engaging with the stop projection of the fast pulley, aspring for movably holding said lever in a normal position with one armreleasing the loose pulley and its other arm in engagement with the stopprojection of the fast pulley, and a catch device forholding the leverin a position against the pressure of the spring with one arm holdingthe loose pulley in operative contact with the fast pulley and its otherarm releasing the connected stop projection of the latter, for thepurpose set forth.

4. In a sewing-machine, the combination, with the main shaft having fastand loose pulleys, the former being provided with a stop projection, ofa lever having one arm for engaging with the loose pulley to force thesame into operative engagement with the fast pul-' ley, a second arm forengaging with the stopprojection of the fast pulley, and a third armcarrying a brake for engaging with the latter,

and means for controlling the action of said lever, for the purpose setforth.

DANL, MILLS.

Witnesses:

CHAS. O. EMMONS, Gno. P. SMITH.

